PH

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Related to Negative pH: pH scale

PH

The two-character ISO 3166 country code for PHILIPPINES.
References in periodicals archive ?
Major Finding: A total of 56% of patients who continued to take Ms after negative pH testing had positive scores on the GerdQ, suggesting that they did have GERD despite the pH results.
A negative pH suggests that the soil pH is above ZPC leading to net negative charge (Sanchez, 1976).
Ohimain [25] recorded pH in the range of 1.3-2.9 in the Niger Delta, whereas more dramatic pH depressions were recorded in Iron Mountain mining site, California, where pH less than zero and negative pH were recorded [26].